About this replacement
HP Pavilion DV7 Series — 14.4V Li-ion Replacement Battery (464059-121)
This 14.4V, 4400mAh (63.36Wh) lithium-ion battery replaces the original cell in HP Pavilion DV7, DV7T, DV7Z, and DV7T-1000 series laptops. It fits the full range of DV7 variants sharing the same connector and voltage rail. Cross-reference OEM part numbers 464059-121, 480385-001, HSTNN-IB74, HSTNN-DB74, and KS525AA before ordering.
- DV7 platform compatibility: The DV7, DV7T, and DV7Z all run the same 14.4V battery rail with an identical connector pinout and BMS handshake protocol — that is why one cell covers all three sub-lines without any adapter or modification.
- Bench tested on actual hardware: We ran this cell on a DV7T under combined CPU and display load. The BMS held voltage above the cutoff threshold through full discharge cycles, and the charge controller accepted a full charge without interruption.
- Post-install calibration on the DV7: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on DV7 hardware.
BIOS reporting poor battery health immediately after fitting a new cell
The HP DV7 BIOS reads health data stored in the battery's EEPROM. A new cell ships with factory EEPROM values that do not match the laptop's learned discharge profile from the old battery. The BIOS interprets that mismatch as degraded health and flags a warning. Running one complete discharge-to-hibernate cycle followed by an uninterrupted charge to 100% rewrites the learned cycle data and clears the warning on the next boot.
DV7 shutting down abruptly at 20–30% charge shown on screen
This is a voltage cliff, not a fuel gauge error. Under full CPU plus display load, cell voltage drops steeply as capacity runs low — the BMS trips the cutoff before the OS gauge reaches 0%. The fuel gauge IC has not yet calibrated its discharge curve against the new cell's chemistry. After two or three full discharge-to-hibernate cycles, the IC maps the actual voltage curve and the shutdown moves down to the correct cutoff point near 3.0V per cell.